CN104791943B - Air-conditioning system and its control method, the outdoor unit of air-conditioning system - Google Patents

Air-conditioning system and its control method, the outdoor unit of air-conditioning system Download PDF

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Publication number
CN104791943B
CN104791943B CN201410027916.6A CN201410027916A CN104791943B CN 104791943 B CN104791943 B CN 104791943B CN 201410027916 A CN201410027916 A CN 201410027916A CN 104791943 B CN104791943 B CN 104791943B
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China
Prior art keywords
saturation temperature
frequency
refrigerant saturation
target refrigerant
changeable compressor
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CN104791943A (en
Inventor
罗彬�
魏富党
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Midea Group Co Ltd
Guangdong Midea HVAC Equipment Co Ltd
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Midea Group Co Ltd
Guangdong Midea HVAC Equipment Co Ltd
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/89—Arrangement or mounting of control or safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties

Abstract

The invention discloses a kind of air-conditioning system and its control method, the outdoor unit of air-conditioning system, wherein control method comprises the following steps：The mode of operation of air-conditioning system is obtained, and frequency-changeable compressor is started according to mode of operation；Obtain target refrigerant saturation temperature；VFC is carried out to frequency-changeable compressor according to target refrigerant saturation temperature；During VFC, the run time and its start-stop time in the 3rd preset time period of frequency-changeable compressor are obtained；It is more than or equal to the 3rd time threshold at runtime, start-stop time of the frequency-changeable compressor in the 3rd preset time period is more than or equal to the second preset times threshold value, and target refrigerant saturation temperature is when being more than or equal to default saturation temperature threshold value, target refrigerant saturation temperature is adjusted according to default step-length.The control method can carry out VFC independently of indoor set to the frequency-changeable compressor of outdoor unit, reduce control parameter transmitting procedure, reduce the complexity of air-conditioning system, improve air-conditioning system operational reliability.

Description

Air-conditioning system and its control method, the outdoor unit of air-conditioning system
Technical field
The present invention relates to air-conditioning technical field, more particularly to a kind of air conditioner system control method and a kind of air-conditioning system Outdoor unit and the air-conditioning system with the outdoor unit.
Background technology
With continuing to develop for air-conditioning technical, DC frequency converting air-conditioner is increasingly welcome by market, and its sales volume also exists Fast lifting.At present, the convertible frequency air-conditioner of in the market is required to supporting installation, and indoor set, outdoor unit need special supporting communication Mode realizes that the compressor to outdoor unit is controlled.Therefore, indoor set, outdoor unit are installed it has to be ensured that synchronous, supporting.
As shown in Figure 1A, outdoor unit must be received from interior the framework of existing frequency-conversion air-conditioning system in the course of the work A series of signals such as switching on and shutting down, temperature setting, the indoor temperature of indoor set of specific transmission that machine is sent rule or by interior Signal after machine processing, so that could realize that the compressor of control outdoor unit is run with specific frequency, and at any time according to interior Change to adjust the running frequency of compressor., could be complete in the prior art, it is necessary to which indoor set sends corresponding signal to outdoor unit The control of all parts in paired outdoor unit so that the structure of air-conditioning system is sufficiently complex, with high costs.Therefore, existing sky Adjusting system needs to be improved.
The content of the invention
The purpose of the present invention is intended at least solve above-mentioned technological deficiency.
Therefore, first purpose of the present invention is to propose a kind of air conditioner system control method, the Air-condition system control side Method can carry out VFC independently of indoor set to the frequency-changeable compressor of outdoor unit, reduce control parameter transmitting procedure, The complexity of air-conditioning system is reduced, air-conditioning system operational reliability is improved.
Second object of the present invention is to propose a kind of outdoor unit of air-conditioning system.Third object of the present invention exists In proposing a kind of air-conditioning system.
To reach above-mentioned purpose, a kind of air conditioner system control method that first aspect present invention embodiment is proposed, including with Lower step：Obtain the mode of operation of air-conditioning system, and the change of the outdoor unit according to the mode of operation startup air-conditioning system Frequency compressor；Obtain target refrigerant saturation temperature；The frequency-changeable compressor is become according to the target refrigerant saturation temperature Frequency is controlled；During the VFC to the frequency-changeable compressor, run time and the institute of the frequency-changeable compressor are obtained State start-stop time of the frequency-changeable compressor in the 3rd preset time period；And the frequency-changeable compressor run time be more than etc. In the 3rd time threshold, start-stop time of the frequency-changeable compressor in the 3rd preset time period, which is more than or equal to second, to be preset Frequency threshold value, and the target refrigerant saturation temperature is when being more than or equal to default saturation temperature threshold value, is adjusted according to default step-length The target refrigerant saturation temperature.
Air conditioner system control method according to embodiments of the present invention, by obtaining target refrigerant saturation temperature come to outdoor unit Frequency-changeable compressor carry out VFC, and in the control process to frequency-changeable compressor, when obtaining the operation of frequency-changeable compressor Between and start-stop time of the frequency-changeable compressor in the 3rd preset time period, and be more than or equal in the run time of frequency-changeable compressor 3rd time threshold, start-stop time of the frequency-changeable compressor in the 3rd preset time period is more than or equal to the second preset times threshold value, And target refrigerant saturation temperature is when being more than or equal to default saturation temperature threshold value, target refrigerant saturation temperature is adjusted according to default step-length Degree, so as to be achieved independently of indoor set and VFC is carried out to frequency-changeable compressor, is carried out specific without indoor set and outdoor unit Communication to transmit corresponding control parameter, reduce control parameter transmitting procedure, reduce the complexity of air-conditioning system, improve Air-conditioning system operational reliability.And so that the ability of air-conditioning system is played in time.
According to one embodiment of present invention, remote control, line control machine or room are received by the communicator of the outdoor unit Switching on and shutting down instruction and mode selection command that interior machine is sent, to obtain the mode of operation of the air-conditioning system.
According to one embodiment of present invention, in addition to：When shutting down, by the target refrigerant saturation temperature after adjustment Spend as target refrigerant saturation temperature during outdoor unit start next time.
Wherein, when the mode of operation is heating mode, the target refrigerant saturation is reduced according to the default step-length Temperature, and the run time of the frequency-changeable compressor is returned 0；When the mode of operation is refrigeration mode, according to described default Step-length increases the target refrigerant saturation temperature, and the run time of the frequency-changeable compressor is returned into 0.
According to one embodiment of present invention, the acquisition target refrigerant saturation temperature further comprises：If the room When outer machine starts for the first time within the default work period, then the current environmental temperature of the outdoor unit is detected；And according to described The current environmental temperature of outdoor unit determines the target refrigerant saturation temperature.
According to one embodiment of present invention, when the mode of operation is refrigeration mode, by being arranged on the frequency conversion First pressure sensor at suction port of compressor obtains first pressure detection signal.
According to another embodiment of the invention, when the mode of operation is heating mode, by being arranged on the change Second pressure sensor at frequency compressor outlet obtains second pressure detection signal.
According to one embodiment of present invention, the frequency-changeable compressor is become according to the target refrigerant saturation temperature Frequency is controlled, and is further comprised：The first pressure detection signal and second pressure detection signal are selected according to the mode of operation One of the current refrigerant saturation temperature of generation；And according to the current refrigerant saturation temperature and the target refrigerant saturation temperature pair The frequency-changeable compressor carries out VFC.
According to one embodiment of present invention, in addition to：After the switching on and shutting down for receiving the outdoor unit are instructed, control The outdoor unit delay preset time start is shut down.
To reach above-mentioned purpose, a kind of outdoor unit for air-conditioning system that second aspect of the present invention embodiment is proposed, including：Become Frequency compressor；Controller, the controller is used to be controlled the frequency-changeable compressor, and the controller includes：Start mould Block, the mode of operation for obtaining air-conditioning system, and according to the outdoor of the mode of operation of the air-conditioning system startup air-conditioning system The frequency-changeable compressor of machine；Target refrigerant saturation temperature control module, becomes for obtaining target refrigerant saturation temperature, and to described During the VFC of frequency compressor, the run time and the frequency-changeable compressor of the frequency-changeable compressor are obtained the 3rd Start-stop time in preset time period, and it is more than or equal to the 3rd time threshold, institute in the run time of the frequency-changeable compressor State start-stop time of the frequency-changeable compressor in the 3rd preset time period and be more than or equal to the second preset times threshold value, and the mesh When marking refrigerant saturation temperature more than or equal to default saturation temperature threshold value, the target refrigerant saturation temperature control module is according to pre- If step-length adjusts the target refrigerant saturation temperature；VFC module, for according to the target refrigerant saturation temperature to institute State frequency-changeable compressor and carry out VFC.
The outdoor unit of air-conditioning system according to embodiments of the present invention, by obtaining target refrigerant saturation temperature come to frequency conversion pressure Contracting machine carries out VFC, and in the control process to frequency-changeable compressor, obtains running frequency and the frequency conversion of frequency-changeable compressor Start-stop time of the compressor in the 3rd preset time period, is more than or equal to the 3rd time threshold in the run time of frequency-changeable compressor Value, start-stop time of the frequency-changeable compressor in the 3rd preset time period is more than or equal to the second preset times threshold value, and target refrigerant When saturation temperature is more than or equal to default saturation temperature threshold value, target refrigerant saturation temperature, therefore nothing are adjusted according to default step-length Particular communication need to be carried out with indoor set and can obtain the control parameter being controlled to frequency-changeable compressor, realize and frequency conversion is compressed Machine carries out VFC so that the structure of air-conditioning system becomes simpler, greatly reduces cost, and cause air-conditioning system Ability played in time.
According to one embodiment of present invention, the target refrigerant saturation temperature control module, being additionally operable to will when shutting down The target refrigerant saturation temperature after adjustment is used as target refrigerant saturation temperature during outdoor unit start next time.
Wherein, when the mode of operation is heating mode, the target refrigerant saturation temperature control module is according to described Default step-length reduces the target refrigerant saturation temperature, and the run time of the frequency-changeable compressor is returned into 0；In the Working mould When formula is refrigeration mode, the target refrigerant saturation temperature control module increases the target refrigerant according to the default step-length and satisfied And temperature, and the run time of the frequency-changeable compressor is returned 0.
According to one embodiment of present invention, in addition to：The first pressure for being arranged on the frequency-changeable compressor porch is passed Sensor, first pressure sensor generation first pressure detection signal when the mode of operation is refrigeration mode.
According to another embodiment of the invention, in addition to：It is arranged on the second pressure in the frequency-changeable compressor exit Sensor, second pressure sensor generation second pressure detection signal when the mode of operation is heating mode.
According to one embodiment of present invention, the target refrigerant saturation temperature control module is selected according to the mode of operation One of the first pressure detection signal and second pressure detection the signal current refrigerant saturation temperature of generation are selected, and it is cold to obtain target Matchmaker's saturation temperature, the VFC module is according to the current refrigerant saturation temperature, the target refrigerant saturation temperature to institute State frequency-changeable compressor and carry out VFC.
According to one embodiment of present invention, in addition to：Temperature sensor, the temperature sensor detects the outdoor unit The current environmental temperature of local environment, wherein, if the outdoor unit starts for the first time within the default work period, the mesh Mark refrigerant saturation temperature control module determines the target refrigerant saturation temperature according to the current environmental temperature of the outdoor unit.
To reach above-mentioned purpose, third aspect present invention embodiment proposes a kind of air-conditioning system, and it includes the present invention the The outdoor unit for the air-conditioning system that two aspect embodiments are proposed.
Air-conditioning system according to embodiments of the present invention, outdoor unit is according to the operational factor of frequency-changeable compressor to frequency-changeable compressor VFC is carried out, control parameter is obtained without indoor set or without outdoor unit and indoor set progress particular communication so that The structure of air-conditioning system becomes simpler, greatly reduces cost.
The additional aspect of the present invention and advantage will be set forth in part in the description, and will partly become from the following description Obtain substantially, or recognized by the practice of the present invention.
Brief description of the drawings
Of the invention above-mentioned and/or additional aspect and advantage will become from the following description of the accompanying drawings of embodiments Substantially and be readily appreciated that, wherein：
Figure 1A is the Organization Chart of existing frequency-conversion air-conditioning system；
Figure 1B is the Organization Chart of the air-conditioning system according to one embodiment of the invention；
Fig. 2 is the Organization Chart of the air-conditioning system according to another embodiment of the present invention；
Fig. 3 is the control logic schematic diagram of the air-conditioning system according to embodiment 1；
Fig. 4 is the control logic schematic diagram of the air-conditioning system according to embodiment 2；
Fig. 5 is the flow chart of the air conditioner system control method according to the embodiment of the present invention；
Fig. 6 is the flow chart of the air conditioner system control method according to one embodiment of the invention；And
Fig. 7 is the block diagram of the outdoor unit of the air-conditioning system according to the embodiment of the present invention.
Reference：
Indoor set 1：Interior machine control signal receiving module 11, interior machine control processor 12, signal transmission module 13, indoor wind Machine 14 and indoor choke valve 15；
Outdoor unit 2：Frequency-changeable compressor Mc and controller 21, communicator 22, first pressure sensor 23, second pressure sensing Device 24, temperature sensor 25, outer blower fan Mf, outer expansion valve Ev, outer four-way valve SV and outer machine system protection sensor 26, system ginseng Number acquisition module 27；
Remote control 3；
Line control machine 4；
Controller 21：Compressor output frequency control module 211 (VFC module 203), blower fan output control module 212nd, outer expansion valve output control module 213 and outer four-way valve output control module 214, starting module 201, target refrigerant saturation Temperature control modules 202.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached The embodiment of figure description is exemplary, is only used for explaining the present invention, and is not construed as limiting the claims.
Following disclosure provides many different embodiments or example is used for realizing the different structure of the present invention.For letter Change disclosure of the invention, hereinafter the part and setting of specific examples are described.Certainly, they are only merely illustrative, and Purpose does not lie in the limitation present invention.In addition, the present invention can in different examples repeat reference numerals and/or letter.It is this heavy It is the relation between itself not indicating discussed various embodiments and/or setting for purposes of simplicity and clarity again.This Outside, the invention provides various specific techniques and material example, but those of ordinary skill in the art can be appreciated that The applicable property of other techniques and/or the use of other materials.In addition, fisrt feature described below second feature it " on " structure can include the first and second features and be formed as the embodiment that directly contacts, other feature shape can also be included Into the embodiment between the first and second features, such first and second feature may not be direct contact.
In the description of the invention, it is necessary to explanation, unless otherwise prescribed and limit, term " installation ", " connected ", " connection " should be interpreted broadly, for example, it may be mechanically connect or electrical connection or the connection of two element internals, can To be to be joined directly together, it can also be indirectly connected to by intermediary, for the ordinary skill in the art, can basis Concrete condition understands the concrete meaning of above-mentioned term.
With reference to the accompanying drawings come the air-conditioning system for describing to propose according to embodiments of the present invention, air conditioner system control method and The outdoor unit of air-conditioning system.
First, the air-conditioning system that embodiment is proposed with reference to the accompanying drawings to describe the present invention.
Figure 1B is the Organization Chart of the air-conditioning system according to one embodiment of the invention.As shown in Figure 1B, the air-conditioning system bag Include indoor set 1 and outdoor unit 2.
Wherein, outdoor unit 2 includes frequency-changeable compressor Mc and controller 21, and controller 21 is according to frequency-changeable compressor Mc operation Parameter and independently of indoor set 1 to frequency-changeable compressor Mc carry out VFC.
Also, outdoor unit 2 also include communicator 22, communicator 22 be used for receive remote control 3, line control machine 4 directly transmit or Switching on and shutting down instruction and mode selection command that indoor set 1 is sent, wherein, controller 21 is according to frequency-changeable compressor Mc operational factor Mode of operation corresponding with mode selection command carries out VFC to frequency-changeable compressor Mc.Specifically, as shown in Figure 1B, communicate Device 22 is signal receiving module, and is only directly transmitted by the reception of control signal receiving module from remote control 3, line control machine 4 Switching on and shutting down command control signal and mode selection command control signal, or by control signal receiving module receive come from room Switching on and shutting down command control signal and mode selection command control signal that interior machine 1 is sent.
As shown in Figure 1B, indoor set 1 includes interior machine control signal receiving module 11, interior machine control processor 12, signal biography The major electrical equipment parts such as defeated module 13, indoor fan 14 and indoor choke valve 15.Indoor fan 14 and indoor choke valve 15 are by interior Machine control processor 12 is controlled, and indoor set 1 is referred to switching on and shutting down command control signal and model selection by signal transmission module 13 Control signal is made to be transferred to the control signal receiving module of communicator 22 with general transmission rule.Wherein, switching on and shutting down instruction control Signal and mode selection command control signal processed can be transmitted directly to the communicator 22 in outdoor unit 2 by indoor set 1.Or, Indoor set 1 receives the switching on and shutting down sent from remote control 3, line control machine 4 by interior machine control signal receiving module 11 and instructs control Signal and mode selection command control signal, then indoor set 1 by signal transmission module 13 by switching on and shutting down command control signal The control signal receiving module of communicator 22 is transmitted to general transmission rule with mode selection command control signal.
In an embodiment of the present invention, the air-conditioning system is controlled according to switching on and shutting down command control signal and mode selection command The start and stop and model selection of the outer machine of signal control room.
As shown in Figure 1B, outdoor unit 2 also includes the first pressure sensor 23 for being arranged on frequency-changeable compressor Mc porch, the One pressure sensor 23 generation first pressure detection signal when mode of operation is refrigeration mode.Wherein, when air-conditioning system is single During cold, it only need to set first pressure sensor 23 at frequency-changeable compressor Mc muffler to detect air-conditioning system refrigeration time-varying Frequency compressor Mc return-air low-pressure lateral pressures.
In another embodiment of the present invention, as shown in Fig. 2 outdoor unit 2 also goes out including being arranged on frequency-changeable compressor Mc Second pressure sensor 24 at mouthful, the generation second pressure detection when mode of operation is heating mode of second pressure sensor 24 Signal.That is, when air-conditioning system is air conditioner, need to also set second pressure to pass at frequency-changeable compressor Mc blast pipe Frequency-changeable compressor Mc is vented high side pressure when sensor 24 is to detect that air-conditioning system is heated.It is of course also possible to behind four-way valve A pressure sensor is assembled, is low-pressure lateral pressure during refrigeration, it is substantially suitable with back pressure.It is high pressure side pressure when heating Power is substantially suitable with pressure at expulsion.
Wherein, controller 21 selects first pressure detection signal and second pressure to detect signal all one's life according to mode of operation Into current refrigerant saturation temperature, and target refrigerant saturation temperature is obtained, and according to current refrigerant saturation temperature, target refrigerant saturation Temperature carries out VFC to frequency-changeable compressor Mc, wherein, during the VFC to frequency-changeable compressor Mc, controller 21 Target refrigerant saturation temperature is adjusted according to frequency-changeable compressor Mc operational factor.In an embodiment of the present invention, control Device 21 regard the target refrigerant saturation temperature after adjustment as initial target refrigerant during start next time of outdoor unit 2 when shutting down Saturation temperature.
Also, as shown in Figure 1B or Fig. 2, outdoor unit 2 also includes temperature sensor 25, the detection outdoor unit of temperature sensor 25 The current environmental temperature of 2 local environments, wherein, if outdoor unit 2 starts for the first time within the default work period, controller 21 Target refrigerant saturation temperature is determined according to the current environmental temperature of outdoor unit 2.It should be noted that the default work period should be made extensively Reason and good sense solution, can be several years, or some months.For example, after outdoor unit 2 is being closed summer, be just then turned on until winter, When at this moment starting for the first time if in the winter after some months, controller 21 is determined according to the current environmental temperature of outdoor unit 2 Target refrigerant after target refrigerant saturation temperature, rather than the adjustment recorded during last shutdown (summer a few months ago) is satisfied And temperature.
In addition, as shown in Figure 1B or Fig. 2, outdoor unit 2 also includes outer blower fan Mf, outer expansion valve Ev, outer four-way valve SV and outer Machine system protection sensor 26, systematic parameter acquisition module 27, systematic parameter acquisition module 27 are connected to each sensor and control Between device 21 processed, first pressure sensor 23, second pressure sensor 24 and temperature sensor 25, outer machine system protection are passed The parameter that sensor 26 is gathered is sent to controller 21 after being handled.Wherein, controller 21 is controlled including compressor output frequency Module 211, blower fan output control module 212, outer expansion valve output control module 213 and outer four-way valve output control module 214, Compressor output frequency control module 211, blower fan output control module 212, outer expansion valve output control module 213 and outer four-way Valve output control module 214 respectively according to systematic parameter acquisition module 27 export collection signal realize to frequency-changeable compressor Mc, Outer blower fan Mf, outer expansion valve Ev and outer four-way valve SV are accordingly controlled.
In one embodiment of the invention, the run time of the operational factor of frequency-changeable compressor including frequency-changeable compressor with And start-stop time of the frequency-changeable compressor in the 3rd preset time period, wherein the run time in frequency-changeable compressor is more than or equal to the Three time thresholds, start-stop time of the frequency-changeable compressor in the 3rd preset time period is more than or equal to the second preset times threshold value, and When target refrigerant saturation temperature is more than or equal to default saturation temperature threshold value, controller adjusts target refrigerant according to default step-length and satisfied And temperature.
Specifically, implementation of the present invention is described in detail with two embodiments of heating mode and refrigeration mode separately below The control process of the air-conditioning system of example.
【Embodiment 1】
As shown in figure 3, in cooling mode, the first pressure for detecting refrigerant low-pressure lateral pressure value is configured with outdoor unit 2 Force snesor 23, outdoor unit 2 freezes according to the mode selection command control signal and switching on and shutting down command control signal received to be transported OK.
Also, if indoor set was started for the first time in the default work period, controller then works as front ring according to outdoor unit Border temperature determines target refrigerant saturation temperature Tes, for example, outdoor environment temperature is between 30-35 DEG C, it is determined that initial target it is cold Matchmaker's saturation temperature be 6 DEG C, outdoor environment temperature between 35-40 DEG C, it is determined that initial target refrigerant saturation temperature be 3 DEG C, room External environment temperature between 25-30 DEG C, it is determined that initial target refrigerant saturation temperature be 8 DEG C.If indoor set is not default work Make for the first time to start in the cycle, the target refrigerant saturation temperature that controller is recorded when then being shut down according to the last time is started shooting as this When initial target refrigerant saturation temperature.
Then the first pressure that controller is generated according to first pressure sensor 23 detects the current refrigerant saturation of signal generation Temperature Te, PID regulations are constantly carried out then according to target refrigerant saturation temperature Tes to current refrigerant saturation temperature Te.Wherein, it is right It is described as follows in PID control：
Current refrigerant saturation temperature Te and target refrigerant saturation temperature Tes deviation △ e=Te-Tes (such as current Te =10, target refrigerant saturation temperature Tes=6, then current △ e0=10-6=4), due to chip gathered data be it is discrete, Feedback quantity is determined according to (such as before 40s) the △ e1 and current △ e0 difference or △ e1 and △ e0 weighted value before certain time PID calculating is carried out, to draw the changing value of frequency-changeable compressor running frequency.Wherein, compressor rotary speed=current rotating speed+compressor Rotation speed change amount, and compressor rotary speed variable quantity=(Kp+Ki/s+Kd*s) * E (△ e1, △ e0), wherein Kp, Ki, s, Kd is pre- The constant first set, △ e1, △ e0 is the feedback variable monitored in real time.
In the present embodiment, it is more than or equal to the 3rd time threshold such as certain time A in the run time of frequency-changeable compressor After minute, controller judges whether to need to target refrigerant saturation temperature according to the machine stop times received and indoor ability need Tes is modified, that is, is sayed, controller judges opening for the frequency-changeable compressor received in the 3rd preset time period in such as B minutes Stop whether number of times is more than or equal to the second preset times such as D times, and whether target refrigerant saturation temperature Tes is more than or equal in advance If saturation temperature threshold value C, to judge whether to need to be modified target refrigerant saturation temperature Tes.
If the run time of frequency-changeable compressor is more than or equal to the 3rd time threshold for example more than A minutes, normally it is included in Machine stop times were more than or equal to D times in B minutes, and target refrigerant saturation temperature Tes is more than or equal to C, judged the room of air-conditioning system Inner side cooling load is smaller, and controller adjusts target refrigerant saturation temperature Tes according to default step-length, i.e., constantly correct mesh upwards Refrigerant saturation temperature Tes is marked, for example, adjusts Tes=Tes+1, more fresh target refrigerant saturation temperature Tes, while by the frequency conversion pressure The run time of contracting machine returns 0, restarts timing, with the target refrigerant saturation temperature Tes of renewal to current refrigerant saturation temperature Te constantly carries out PID regulations, allows frequency-changeable compressor to reduce rotating speed in the running, refrigerating capacity output is reduced, so as to slowly reduce Indoor temperature, reduces the state of outdoor unit frequent shutdown.Meanwhile, current goal refrigerant saturation temperature is recorded, can be as next The initial target refrigerant saturation temperature of secondary start.
Therefore, the air-conditioning system of the embodiment of the present invention can influence refrigeration system operation to join according to system indoor load situation Several situations is identified and judged, thus intelligently adjust frequency-changeable compressor running frequency, make air-conditioning system ability and Shi Fahui, reaches design temperature requirement.
【Embodiment 2】
As shown in figure 4, in a heating mode, the second pressure for detecting refrigerant high side pressure value is configured with outdoor unit 2 Force snesor 24, outdoor unit 2 heats fortune according to the mode selection command control signal and switching on and shutting down command control signal that receive OK.
Also, if indoor set was started for the first time in the default work period, controller then works as front ring according to outdoor unit Border temperature determines target refrigerant saturation temperature Tcs, for example, outdoor environment temperature is between 7-10 DEG C, it is determined that initial target it is cold Matchmaker's saturation temperature is 46 DEG C.
Then the second pressure that controller is generated according to second pressure sensor 24 detects the current refrigerant saturation of signal generation Temperature Tc, PID regulations are constantly carried out then according to target refrigerant saturation temperature Tcs to current refrigerant saturation temperature Tc.
In the present embodiment, it is more than or equal to the 3rd time threshold such as certain time A in the run time of frequency-changeable compressor After minute, controller judges whether to need to target refrigerant saturation temperature according to the machine stop times received and indoor ability need Tcs is modified, that is, is sayed, controller judges opening for the frequency-changeable compressor received in the 3rd preset time period in such as B minutes Stop whether number of times is more than or equal to the second preset times such as D times, and whether target refrigerant saturation temperature Tcs is more than or equal in advance If saturation temperature threshold value C, to judge whether to need to be modified target refrigerant saturation temperature Tcs.
If the run time of frequency-changeable compressor is more than or equal to the 3rd time threshold for example more than A minutes, normally it is included in Machine stop times were more than or equal to D times in B minutes, and target refrigerant saturation temperature Tcs is more than or equal to C, judged the room of air-conditioning system Inner side heating load is smaller, and controller adjusts target refrigerant saturation temperature Tcs, i.e., continuous downward revision mesh according to default step-length Refrigerant saturation temperature Tcs is marked, for example, adjusts Tcs=Tcs-1, more fresh target refrigerant saturation temperature Tcs, while by the frequency conversion pressure The run time of contracting machine returns 0, restarts timing, with the target refrigerant saturation temperature Tcs of renewal to current refrigerant saturation temperature Tc constantly carries out PID regulations, allows frequency-changeable compressor to reduce rotating speed in the running, heating capacity output is reduced, so as to slowly improve Indoor temperature, reduces the state of outdoor unit frequent shutdown.Meanwhile, current goal refrigerant saturation temperature is recorded, can be as next The initial target refrigerant saturation temperature of secondary start.
Therefore, the air-conditioning system of the embodiment of the present invention can influence heating operation to join according to system indoor load situation Several situations is identified and judged, thus intelligently adjust frequency-changeable compressor running frequency, make air-conditioning system ability and Shi Fahui, reaches design temperature requirement.
In an embodiment of the present invention, air-conditioning system can be one-to-one system or one drags multisystem, and should Air-conditioning system can be single cooler or air conditioner.Wherein indoor set does not communicate the parameters such as indoor environment temperature to room Outer machine, and be only that the startup-shutdown instruction sent according to line control machine, remote control or indoor set controls the start-stop of outdoor unit.This hair The air-conditioning system of bright embodiment can be under machine and outdoor unit are communicated without control parameter indoors refrigeration and/or heating mode Control frequency-changeable compressor, the controller of outdoor unit can autonomous learning complete the electrical equipment of the outdoor units such as rapid control frequency-changeable compressor Part, so that indoor temperature reaches and maintains design temperature.
Embodiments in accordance with the present invention, controller 21 enters line delay certain time for example when receiving machine open/close signal Handle within S seconds, to prevent client from causing outdoor unit 2 to start operating because of maloperation selection, it is to avoid the controller of outdoor unit carries out mistake Judge.That is, controller is after switching on and shutting down instruction is received, the start in such as S seconds of delay preset time or shutdown.
The controller of outdoor unit in air-conditioning system according to embodiments of the present invention, air-conditioning system is according to frequency-changeable compressor Operational factor carries out VFC independently of indoor set to frequency-changeable compressor, is specifically led to without indoor set and outdoor unit Interrogate to transmit corresponding control parameter so that the structure of air-conditioning system becomes simpler, greatly reduces cost.
The air conditioner system control method proposed according to embodiments of the present invention described with reference to the accompanying drawings.
Fig. 5 is the flow chart of the air conditioner system control method according to the embodiment of the present invention.As shown in figure 5, the air-conditioning system Control method comprises the following steps：
S1, obtains the operational factor of the frequency-changeable compressor of the outdoor unit of air-conditioning system.
S2, using the controller of outdoor unit according to the indoor set pair of the operational factor of frequency-changeable compressor independently of air-conditioning system The frequency-changeable compressor of outdoor unit carries out VFC.
That is, after air-conditioning system is started, the first pressure sensor and/or second pressure sensor point of outdoor unit Not Jian Ce frequency-changeable compressor air inlet pressure force value and/or exhaust pressure value, and temperature sensor detection outdoor unit around environment Temperature, and the frequency-changeable compressor air inlet pressure force value and/or exhaust pressure value that detect and outdoor unit environment temperature are sent to Systematic parameter acquisition module, frequency-changeable compressor air inlet pressure force value that controller is collected according to systematic parameter acquisition module and/or Exhaust pressure value and outdoor unit environment temperature carry out internal arithmetic processing to generate control signal, and frequency-changeable compressor is carried out VFC, and externally blower fan, outer expansion valve, outer four-way valve are accordingly controlled.
In the air conditioner system control method of the embodiment of the present invention, the controller of outdoor unit is according to the operation of frequency-changeable compressor Parameter carries out VFC independently of indoor set to frequency-changeable compressor, without indoor set and outdoor unit carry out specific communication with Corresponding control parameter is transmitted, control parameter transmitting procedure is reduced, the complexity of air-conditioning system is reduced, air-conditioning system is improved System operational reliability.
Further, as shown in fig. 6, air conditioner system control method according to an embodiment of the invention includes following step Suddenly：
S801, obtains the mode of operation of air-conditioning system, and the frequency conversion of the outdoor unit according to mode of operation startup air-conditioning system Compressor.
Wherein, by the communicator of outdoor unit receive switching on and shutting down instruction that remote control, line control machine or indoor set send and Mode selection command, to obtain the mode of operation of air-conditioning system.
S802, obtains target refrigerant saturation temperature.
Wherein, according to one embodiment of present invention, if outdoor unit starts for the first time within the default work period, The current environmental temperature of outdoor unit is detected, target refrigerant saturation temperature is determined according to the current environmental temperature of outdoor unit.Need Bright, the default work period should broadly understood, and can be several years, or some months.For example, when outdoor unit is in summer After closing, just it is then turned on until winter, when at this moment starting for the first time if in the winter after some months, controller is according to outdoor The current environmental temperature of machine determines what is recorded when target refrigerant saturation temperature, rather than last time are shut down (summer a few months ago) Target refrigerant saturation temperature after adjustment.
S803, VFC is carried out according to target refrigerant saturation temperature to frequency-changeable compressor.
S804, during the VFC to frequency-changeable compressor, obtains run time and the frequency conversion of frequency-changeable compressor Start-stop time of the compressor in the 3rd preset time period.
S805, is more than or equal to the 3rd time threshold in the run time of frequency-changeable compressor, and frequency-changeable compressor is default the 3rd Start-stop time in period is more than or equal to the second preset times threshold value, and target refrigerant saturation temperature is full more than or equal to default During with temperature threshold, target refrigerant saturation temperature is adjusted according to default step-length.
Wherein, when mode of operation is heating mode, target refrigerant saturation temperature is reduced according to default step-length, and will be described The run time of frequency-changeable compressor returns 0；When mode of operation is refrigeration mode, target refrigerant saturation temperature is increased according to default step-length Degree, and the run time of the frequency-changeable compressor is returned 0.
The embodiment of the present invention is described in detail in embodiment 1 and the embodiment 2 of heating mode separately below in a chiller mode Air conditioner system control method.
【Embodiment 1】
As shown in figure 3, in cooling mode, the first pressure for detecting refrigerant low-pressure lateral pressure value is configured with outdoor unit 2 Force snesor 23, outdoor unit 2 freezes according to the mode selection command control signal and switching on and shutting down command control signal received to be transported OK.
Also, if indoor set was started for the first time in the default work period, controller then works as front ring according to outdoor unit Border temperature determines target refrigerant saturation temperature Tes, for example, outdoor environment temperature is between 30-35 DEG C, it is determined that initial target it is cold Matchmaker's saturation temperature be 6 DEG C, outdoor environment temperature between 35-40 DEG C, it is determined that initial target refrigerant saturation temperature be 3 DEG C, room External environment temperature between 25-30 DEG C, it is determined that initial target refrigerant saturation temperature be 8 DEG C.If indoor set is not default work Make for the first time to start in the cycle, the target refrigerant saturation temperature that controller is recorded when then being shut down according to the last time is started shooting as this When initial target refrigerant saturation temperature.
Then the first pressure that controller is generated according to first pressure sensor 23 detects the current refrigerant saturation of signal generation Temperature Te, PID regulations are constantly carried out then according to target refrigerant saturation temperature Tes to current refrigerant saturation temperature Te.Wherein, it is right It is described as follows in PID control：
Current refrigerant saturation temperature Te and target refrigerant saturation temperature Tes deviation △ e=Te-Tes (such as current Te =10, target refrigerant saturation temperature Tes=6, then current △ e0=10-6=4), due to chip gathered data be it is discrete, Feedback quantity is determined according to (such as before 40s) the △ e1 and current △ e0 difference or △ e1 and △ e0 weighted value before certain time PID calculating is carried out, to draw the changing value of frequency-changeable compressor running frequency.Wherein, compressor rotary speed=current rotating speed+compressor Rotation speed change amount, and compressor rotary speed variable quantity=(Kp+Ki/s+Kd*s) * E (△ e1, △ e0), wherein Kp, Ki, s, Kd is pre- The constant first set, △ e1, △ e0 is the feedback variable monitored in real time.
In the present embodiment, it is more than or equal to the 3rd time threshold such as certain time A in the run time of frequency-changeable compressor After minute, controller judges whether to need to target refrigerant saturation temperature according to the machine stop times received and indoor ability need Tes is modified, that is, is sayed, controller judges opening for the frequency-changeable compressor received in the 3rd preset time period in such as B minutes Stop whether number of times is more than or equal to the second preset times such as D times, and whether target refrigerant saturation temperature Tes is more than or equal in advance If saturation temperature threshold value C, to judge whether to need to be modified target refrigerant saturation temperature Tes.
If the run time of frequency-changeable compressor is more than or equal to the 3rd time threshold for example more than A minutes, normally it is included in Machine stop times were more than or equal to D times in B minutes, and target refrigerant saturation temperature Tes is more than or equal to C, judged the room of air-conditioning system Inner side cooling load is smaller, and controller adjusts target refrigerant saturation temperature Tes according to default step-length, i.e., constantly correct mesh upwards Refrigerant saturation temperature Tes is marked, for example, adjusts Tes=Tes+1, more fresh target refrigerant saturation temperature Tes, while by the frequency conversion pressure The run time of contracting machine returns 0, restarts timing, with the target refrigerant saturation temperature Tes of renewal to current refrigerant saturation temperature Te constantly carries out PID regulations, allows frequency-changeable compressor to reduce rotating speed in the running, refrigerating capacity output is reduced, so as to slowly reduce Indoor temperature, reduces the state of outdoor unit frequent shutdown.Meanwhile, current goal refrigerant saturation temperature is recorded, can be as next The initial target refrigerant saturation temperature of secondary start.
Therefore, the air conditioner system control method of the embodiment of the present invention can be according to system indoor load situation influence refrigeration system The situation of system operational factor is identified and judged, so as to intelligently adjust the running frequency of frequency-changeable compressor, makes air-conditioning system Ability play in time, reach design temperature requirement.
【Embodiment 2】
As shown in figure 4, in a heating mode, the second pressure for detecting refrigerant high side pressure value is configured with outdoor unit 2 Force snesor 24, outdoor unit 2 heats fortune according to the mode selection command control signal and switching on and shutting down command control signal that receive OK.
Also, if indoor set was started for the first time in the default work period, controller then works as front ring according to outdoor unit Border temperature determines target refrigerant saturation temperature Tcs, for example, outdoor environment temperature is between 7-10 DEG C, it is determined that initial target it is cold Matchmaker's saturation temperature is 46 DEG C.
Then the second pressure that controller is generated according to second pressure sensor 24 detects the current refrigerant saturation of signal generation Temperature Tc, PID regulations are constantly carried out then according to target refrigerant saturation temperature Tcs to current refrigerant saturation temperature Tc.
In the present embodiment, it is more than or equal to the 3rd time threshold such as certain time A in the run time of frequency-changeable compressor After minute, controller judges whether to need to target refrigerant saturation temperature according to the machine stop times received and indoor ability need Tcs is modified, that is, is sayed, controller judges opening for the frequency-changeable compressor received in the 3rd preset time period in such as B minutes Stop whether number of times is more than or equal to the second preset times such as D times, and whether target refrigerant saturation temperature Tcs is more than or equal in advance If saturation temperature threshold value C, to judge whether to need to be modified target refrigerant saturation temperature Tcs.
If the run time of frequency-changeable compressor is more than or equal to the 3rd time threshold for example more than A minutes, normally it is included in Machine stop times were more than or equal to D times in B minutes, and target refrigerant saturation temperature Tcs is more than or equal to C, judged the room of air-conditioning system Inner side heating load is smaller, and controller adjusts target refrigerant saturation temperature Tcs, i.e., continuous downward revision mesh according to default step-length Refrigerant saturation temperature Tcs is marked, for example, adjusts Tcs=Tcs-1, more fresh target refrigerant saturation temperature Tcs, while by the frequency conversion pressure The run time of contracting machine returns 0, restarts timing, with the target refrigerant saturation temperature Tcs of renewal to current refrigerant saturation temperature Tc constantly carries out PID regulations, allows frequency-changeable compressor to reduce rotating speed in the running, heating capacity output is reduced, so as to slowly improve Indoor temperature, reduces the state of outdoor unit frequent shutdown.Meanwhile, current goal refrigerant saturation temperature is recorded, can be as next The initial target refrigerant saturation temperature of secondary start.
Therefore, the air conditioner system control method of the embodiment of the present invention can be heated according to the influence of system indoor load situation is The situation of system operational factor is identified and judged, so as to intelligently adjust the running frequency of frequency-changeable compressor, makes air-conditioning system Ability play in time, reach design temperature requirement.
In one embodiment of the invention, when mode of operation is refrigeration mode, entered by being arranged on frequency-changeable compressor First pressure sensor at mouthful obtains first pressure detection signal.
Wherein, when air-conditioning system is single cooler, first pressure need to be only set to sense at the muffler of frequency-changeable compressor Frequency conversion compressor return air low-pressure lateral pressure when device is to detect air-conditioning system refrigeration.
In another embodiment of the present invention, when mode of operation is heating mode, by being arranged on frequency-changeable compressor The second pressure sensor in exit obtains second pressure detection signal.That is, when air-conditioning system is air conditioner, also needing Frequency conversion compressor air-discharging is high when setting second pressure sensor at the blast pipe of frequency-changeable compressor to detect that air-conditioning system is heated Press lateral pressure.It is low-pressure lateral pressure during refrigeration, substantially it is of course also possible to assemble a pressure sensor behind four-way valve It is suitable with back pressure.It is high side pressure when heating, it is substantially suitable with pressure at expulsion.
In step S803, VFC is carried out to frequency-changeable compressor according to target refrigerant saturation temperature, further comprised：
S11, selects first pressure detection signal and second pressure to detect that the generation of one of signal is current cold according to mode of operation Matchmaker's saturation temperature.
S12, VFC is carried out according to current refrigerant saturation temperature and target refrigerant saturation temperature to frequency-changeable compressor.
Also, in one embodiment of the invention, above-mentioned air conditioner system control method also includes：, will when shutting down Target refrigerant saturation temperature after adjustment is used as target refrigerant saturation temperature during outdoor unit start next time.
According to one embodiment of present invention, controller enters line delay certain time example when receiving machine open/close signal Handle within such as S seconds, to prevent client from causing outdoor unit to start operating because of maloperation selection, it is to avoid the controller progress mistake of outdoor unit Judge.That is, after the switching on and shutting down for receiving outdoor unit are instructed, control outdoor unit delay preset time is opened for such as S seconds Machine or shutdown.
Air conditioner system control method according to embodiments of the present invention, by obtaining target refrigerant saturation temperature come to outdoor unit Frequency-changeable compressor carry out VFC, and in the control process to frequency-changeable compressor, when obtaining the operation of frequency-changeable compressor Between and start-stop time of the frequency-changeable compressor in the 3rd preset time period, and be more than or equal in the run time of frequency-changeable compressor 3rd time threshold, start-stop time of the frequency-changeable compressor in the 3rd preset time period is more than or equal to the second preset times threshold value, And target refrigerant saturation temperature is when being more than or equal to default saturation temperature threshold value, target refrigerant saturation temperature is adjusted according to default step-length Degree, so as to be achieved independently of indoor set and VFC is carried out to frequency-changeable compressor, is carried out specific without indoor set and outdoor unit Communication to transmit corresponding control parameter, reduce control parameter transmitting procedure, reduce the complexity of air-conditioning system, improve Air-conditioning system operational reliability.And so that the ability of air-conditioning system is played in time.
The outdoor unit of air-conditioning system proposed according to embodiments of the present invention described with reference to the accompanying drawings.
Fig. 7 is the block diagram of the outdoor unit of the air-conditioning system according to the embodiment of the present invention.As shown in fig. 7, the air-conditioning The outdoor unit 2 of system includes frequency-changeable compressor Mc and controller 21.
Wherein, controller 21 is used to be controlled frequency-changeable compressor, and controller 21 includes：Starting module 201, mesh Mark refrigerant saturation temperature control module 202 and VFC module 203 (compressor output frequency control module 211).
Starting module 201 is used for the mode of operation for obtaining air-conditioning system, and starts sky according to the mode of operation of air-conditioning system The frequency-changeable compressor Mc of the outdoor unit of adjusting system, target refrigerant saturation temperature control module 202 is used to obtain initial target refrigerant Saturation temperature, and during the VFC to frequency-changeable compressor Mc, according to frequency-changeable compressor Mc operational factor to target Refrigerant saturation temperature is adjusted, further, during the VFC to frequency-changeable compressor Mc, target refrigerant saturation temperature Spend control module 202 and obtain the start and stop in the 3rd preset time period time of the run time and frequency-changeable compressor of frequency-changeable compressor Number, and it is more than or equal to the 3rd time threshold in the run time of frequency-changeable compressor, frequency-changeable compressor is in the 3rd preset time period Interior start-stop time is more than or equal to the second preset times threshold value, and target refrigerant saturation temperature is more than or equal to default saturation temperature During threshold value, target refrigerant saturation temperature is adjusted according to default step-length.(compressor output frequency controls mould to VFC module 203 Block 211) it is used to carry out VFC to frequency-changeable compressor Mc according to target refrigerant saturation temperature.
In one embodiment of the invention, target refrigerant saturation temperature control module 202 is additionally operable to adjust when shutting down Target refrigerant saturation temperature after whole is used as target refrigerant saturation temperature during start next time of outdoor unit 2.
As shown in Figure 1B, outdoor unit 2 also includes：The first pressure sensor 23 of frequency-changeable compressor porch is arranged on, the One pressure sensor 23 generation first pressure detection signal when mode of operation is refrigeration mode.Wherein, when air-conditioning system is single During cold, it only need to set first pressure sensor 23 at frequency-changeable compressor Mc muffler to detect air-conditioning system refrigeration time-varying Frequency compressor Mc return-air low-pressure lateral pressures.
According to one embodiment of present invention, as shown in Fig. 2 outdoor unit 2 also includes：It is arranged on frequency-changeable compressor exit Second pressure sensor 24, second pressure sensor 24 mode of operation be heating mode when generation second pressure detection letter Number.That is, when air-conditioning system is air conditioner, need to also set second pressure to sense at frequency-changeable compressor Mc blast pipe Frequency-changeable compressor Mc is vented high side pressure when device 24 is to detect that air-conditioning system is heated.It is of course also possible to be filled behind four-way valve It is low-pressure lateral pressure during refrigeration with a pressure sensor, it is substantially suitable with back pressure.It is high pressure side pressure when heating Power is substantially suitable with pressure at expulsion.
Wherein, target refrigerant saturation temperature control module 202 selects first pressure detection signal and the according to mode of operation One of two pressure detecting signals generate current refrigerant saturation temperature, and obtain target refrigerant saturation temperature, VFC module 203 VFC is carried out to frequency-changeable compressor Mc according to current refrigerant saturation temperature, target refrigerant saturation temperature.
As shown in Figure 1B or Fig. 2, outdoor unit 2 also includes：Temperature sensor 25, the detection outdoor unit 2 of temperature sensor 25 institute Locate the current environmental temperature of environment, wherein, if outdoor unit 2 starts for the first time within the default work period, target refrigerant is satisfied Target refrigerant saturation temperature is determined according to the current environmental temperature of outdoor unit 2 with temperature control modules 202.It should be noted that The default work period should broadly understood, and can be several years, or some months.For example, when outdoor unit 2 is closed in summer Afterwards, just it is then turned on until winter, when at this moment starting for the first time if in the winter after some months, target refrigerant saturation temperature control Molding block 202 determines target refrigerant saturation temperature according to the current environmental temperature of outdoor unit 2, rather than last shutdown is (several Summer before month) when the adjustment that records after target refrigerant saturation temperature.
In one embodiment of the invention, it is more than or equal to the 3rd time threshold in the run time of frequency-changeable compressor, becomes Start-stop time of the frequency compressor in the 3rd preset time period is more than or equal to the second preset times threshold value, and target refrigerant saturation temperature When degree is more than or equal to default saturation temperature threshold value, target refrigerant saturation temperature control module 202 adjusts mesh according to default step-length Mark refrigerant saturation temperature.Wherein, when mode of operation is heating mode, target refrigerant saturation temperature control module 202 is according to pre- If step-length reduces target refrigerant saturation temperature, and the run time of frequency-changeable compressor is returned into 0；It is refrigeration mode in mode of operation When, target refrigerant saturation temperature control module 202 increases target refrigerant saturation temperature according to default step-length, and by frequency-changeable compressor Run time return 0.
Specifically, as shown in figure 3, in cooling mode, being configured with outdoor unit 2 and detecting refrigerant low-pressure lateral pressure value First pressure sensor 23, starting module 201 according to the mode selection command control signal received and switching on and shutting down instruction control Signal processed controls frequency-changeable compressor refrigerating operaton.
Also, if indoor set was started for the first time in the default work period, target refrigerant saturation temperature control module 202 Target refrigerant saturation temperature Tes is then determined according to the current environmental temperature of outdoor unit, for example, outdoor environment temperature is at 30-35 DEG C Between, it is determined that initial target refrigerant saturation temperature be 6 DEG C, outdoor environment temperature between 35-40 DEG C, it is determined that initial target Refrigerant saturation temperature be 3 DEG C, outdoor environment temperature between 25-30 DEG C, it is determined that initial target refrigerant saturation temperature be 8 DEG C. If indoor set was started for the first time in the default work period, target refrigerant saturation temperature control module 202 is then according to upper one Initial target refrigerant saturation temperature when the target refrigerant saturation temperature recorded during secondary shutdown is started shooting as this.
Then the first pressure that target refrigerant saturation temperature control module 202 is generated according to first pressure sensor 23 is detected The current refrigerant saturation temperature Te of signal generation, then VFC module 203 according to target refrigerant saturation temperature Tes to current cold Matchmaker's saturation temperature Te constantly carries out PID regulations.Wherein, it is described as follows for PID control：
Current refrigerant saturation temperature Te and target refrigerant saturation temperature Tes deviation △ e=Te-Tes (such as current Te =10, target refrigerant saturation temperature Tes=6, then current △ e0=10-6=4), due to chip gathered data be it is discrete, Feedback quantity is determined according to (such as before 40s) the △ e1 and current △ e0 difference or △ e1 and △ e0 weighted value before certain time PID calculating is carried out, to draw the changing value of frequency-changeable compressor running frequency.Wherein, compressor rotary speed=current rotating speed+compressor Rotation speed change amount, and compressor rotary speed variable quantity=(Kp+Ki/s+Kd*s) * E (△ e1, △ e0), wherein Kp, Ki, s, Kd is pre- The constant first set, △ e1, △ e0 is the feedback variable monitored in real time.
In the present embodiment, it is more than or equal to the 3rd time threshold such as certain time A in the run time of frequency-changeable compressor After minute, target refrigerant saturation temperature control module 202 judges whether according to the machine stop times received and indoor ability need Need to be modified target refrigerant saturation temperature Tes, that is, say, target refrigerant saturation temperature control module 202 is judged the 3rd Whether the start-stop time for the frequency-changeable compressor that preset time period is received in such as B minutes is more than or equal to the second preset times for example D times, and whether target refrigerant saturation temperature Tes is more than or equal to default saturation temperature threshold value C, to judge whether to need to mesh Mark refrigerant saturation temperature Tes is modified.
If the run time of frequency-changeable compressor is more than or equal to the 3rd time threshold for example more than A minutes, normally it is included in Machine stop times were more than or equal to D times in B minutes, and target refrigerant saturation temperature Tes is more than or equal to C, judged the room of air-conditioning system Inner side cooling load is smaller, and target refrigerant saturation temperature control module 202 adjusts target refrigerant saturation temperature according to default step-length Tes is spent, i.e. constantly upwards amendment target refrigerant saturation temperature Tes, for example, adjust Tes=Tes+1, more fresh target refrigerant saturation temperature Tes is spent, while the run time of the frequency-changeable compressor is returned into 0, restarts timing, with the target refrigerant saturation temperature of renewal Tes constantly carries out PID regulations to current refrigerant saturation temperature Te, and VFC module 203 allows frequency-changeable compressor to drop in the running The slow-speed of revolution, reduces refrigerating capacity output, so as to slowly reduce indoor temperature, reduces the state of outdoor unit frequent shutdown.Meanwhile, mesh Mark refrigerant saturation temperature control module 202 and record current goal refrigerant saturation temperature, the initial mesh started shooting next time can be used as Mark refrigerant saturation temperature.
Therefore, the outdoor unit of the air-conditioning system of the embodiment of the present invention can be according to system indoor load situation influence refrigeration system The situation of system operational factor is identified and judged, so as to intelligently adjust the running frequency of frequency-changeable compressor, makes air-conditioning system Ability play in time, reach design temperature requirement.
In example 2, as shown in figure 4, in a heating mode, target refrigerant saturation temperature control module 202 is to target The adjustment process of refrigerant saturation temperature and the adjustment process class in embodiment 1 in cooling mode to target refrigerant saturation temperature Seemingly, just no longer repeat one by one here.
The outdoor unit of air-conditioning system according to embodiments of the present invention, by obtaining target refrigerant saturation temperature come to frequency conversion pressure Contracting machine carries out VFC, and in the control process to frequency-changeable compressor, obtains running frequency and the frequency conversion of frequency-changeable compressor Start-stop time of the compressor in the 3rd preset time period, is more than or equal to the 3rd time threshold in the run time of frequency-changeable compressor Value, start-stop time of the frequency-changeable compressor in the 3rd preset time period is more than or equal to the second preset times threshold value, and target refrigerant When saturation temperature is more than or equal to default saturation temperature threshold value, target refrigerant saturation temperature, therefore nothing are adjusted according to default step-length Particular communication need to be carried out with indoor set and can obtain the control parameter being controlled to frequency-changeable compressor, realize and frequency conversion is compressed Machine carries out VFC so that the structure of air-conditioning system becomes simpler, greatly reduces cost, and cause air-conditioning system Ability played in time.
In addition, embodiments of the invention also proposed a kind of air-conditioning system, it includes the above embodiment of the present invention proposition The outdoor unit of air-conditioning system.
Air-conditioning system according to embodiments of the present invention, outdoor unit is according to the operational factor of frequency-changeable compressor to frequency-changeable compressor VFC is carried out, control parameter is obtained without indoor set or without outdoor unit and indoor set progress particular communication so that The structure of air-conditioning system becomes simpler, greatly reduces cost.
Any process described otherwise above or method description are construed as in flow chart or herein, represent to include Module, fragment or the portion of the code of one or more executable instructions for the step of realizing specific logical function or process Point, and the scope of the preferred embodiment of the present invention includes other realization, wherein can not be by shown or discussion suitable Sequence, including according to involved function by it is basic simultaneously in the way of or in the opposite order, carry out perform function, this should be of the invention Embodiment person of ordinary skill in the field understood.
Represent in flow charts or logic and/or step described otherwise above herein, for example, being considered use In the order list for the executable instruction for realizing logic function, it may be embodied in any computer-readable medium, for Instruction execution system, device or equipment (such as computer based system including the system of processor or other can be held from instruction The system of row system, device or equipment instruction fetch and execute instruction) use, or combine these instruction execution systems, device or set It is standby and use.For the purpose of this specification, " computer-readable medium " can any can be included, store, communicate, propagate or pass Defeated program is for instruction execution system, device or equipment or the dress for combining these instruction execution systems, device or equipment and using Put.The more specifically example (non-exhaustive list) of computer-readable medium includes following：Electricity with one or more wirings Connecting portion (electronic installation), portable computer diskette box (magnetic device), random access memory (RAM), read-only storage (ROM), erasable edit read-only storage (EPROM or flash memory), fiber device, and portable optic disk is read-only deposits Reservoir (CDROM).In addition, can even is that can be in the paper of printing described program thereon or other are suitable for computer-readable medium Medium, because can then enter edlin, interpretation or if necessary with it for example by carrying out optical scanner to paper or other media His suitable method is handled electronically to obtain described program, is then stored in computer storage.
It should be appreciated that each several part of the present invention can be realized with hardware, software, firmware or combinations thereof.Above-mentioned In embodiment, the software that multiple steps or method can in memory and by suitable instruction execution system be performed with storage Or firmware is realized.If, and in another embodiment, can be with well known in the art for example, realized with hardware Any one of row technology or their combination are realized：With the logic gates for realizing logic function to data-signal Discrete logic, the application specific integrated circuit with suitable combinational logic gate circuit, programmable gate array (PGA), scene Programmable gate array (FPGA) etc..
Those skilled in the art are appreciated that to realize all or part of step that above-described embodiment method is carried Rapid to can be by program to instruct the hardware of correlation to complete, described program can be stored in a kind of computer-readable storage medium In matter, the program upon execution, including one or a combination set of the step of embodiment of the method.
In addition, each functional unit in each embodiment of the invention can be integrated in a processing module, can also That unit is individually physically present, can also two or more units be integrated in a module.Above-mentioned integrated mould Block can both be realized in the form of hardware, it would however also be possible to employ the form of software function module is realized.The integrated module is such as Fruit is realized using in the form of software function module and as independent production marketing or in use, can also be stored in a computer In read/write memory medium.
Storage medium mentioned above can be read-only storage, disk or CD etc..
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means to combine specific features, structure, material or the spy that the embodiment or example are described Point is contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not Necessarily refer to identical embodiment or example.Moreover, specific features, structure, material or the feature of description can be any One or more embodiments or example in combine in an appropriate manner.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with A variety of changes, modification can be carried out to these embodiments, replace without departing from the principles and spirit of the present invention by understanding And modification, the scope of the present invention is by appended claims and its equivalent limits.

Claims (17)

1. a kind of air conditioner system control method, it is characterised in that comprise the following steps：
Obtain the mode of operation of air-conditioning system, and the frequency conversion pressure of the outdoor unit according to the mode of operation startup air-conditioning system Contracting machine；
Obtain target refrigerant saturation temperature；
VFC is carried out to the frequency-changeable compressor according to the target refrigerant saturation temperature；
During the VFC to the frequency-changeable compressor, the run time of the frequency-changeable compressor and the change are obtained Start-stop time of the frequency compressor in the 3rd preset time period；And
It is more than or equal to the 3rd time threshold in the run time of the frequency-changeable compressor, the frequency-changeable compressor is pre- the described 3rd If the start-stop time in the period is more than or equal to the second preset times threshold value, and the target refrigerant saturation temperature is more than or equal to During default saturation temperature threshold value, the target refrigerant saturation temperature is adjusted according to default step-length.
2. air conditioner system control method as claimed in claim 1, it is characterised in that received by the communicator of the outdoor unit Switching on and shutting down instruction and mode selection command that remote control, line control machine or indoor set are sent, to obtain the work of the air-conditioning system Operation mode.
3. air conditioner system control method as claimed in claim 1, it is characterised in that also include：
It is when shutting down, the target refrigerant saturation temperature after adjustment is cold as target during outdoor unit start next time Matchmaker's saturation temperature.
4. air conditioner system control method as claimed in claim 1, it is characterised in that wherein,
When the mode of operation is heating mode, the target refrigerant saturation temperature is reduced according to the default step-length, and will The run time of the frequency-changeable compressor returns 0；
When the mode of operation is refrigeration mode, the target refrigerant saturation temperature is increased according to the default step-length, and will The run time of the frequency-changeable compressor returns 0.
5. air conditioner system control method as claimed in claim 1, it is characterised in that the acquisition target refrigerant saturation temperature is entered One step includes：
If the outdoor unit starts for the first time within the default work period, the current environment temperature of the outdoor unit is detected Degree；And
The target refrigerant saturation temperature is determined according to the current environmental temperature of the outdoor unit.
6. air conditioner system control method as claimed in claim 1, it is characterised in that in the mode of operation be refrigeration mode When, obtain first pressure detection signal by being arranged on the first pressure sensor of the frequency-changeable compressor porch.
7. air conditioner system control method as claimed in claim 6, it is characterised in that in the mode of operation be heating mode When, obtain second pressure detection signal by being arranged on the second pressure sensor in the frequency-changeable compressor exit.
8. air conditioner system control method as claimed in claim 7, it is characterised in that according to the target refrigerant saturation temperature pair The frequency-changeable compressor carries out VFC, further comprises：
Select the generation of one of the first pressure detection signal and second pressure detection signal current cold according to the mode of operation Matchmaker's saturation temperature；And
Frequency conversion control is carried out to the frequency-changeable compressor according to the current refrigerant saturation temperature and the target refrigerant saturation temperature System.
9. air conditioner system control method as claimed in claim 1, it is characterised in that also include：
After the switching on and shutting down for receiving the outdoor unit are instructed, control the outdoor unit delay preset time start or shut down.
10. a kind of outdoor unit of air-conditioning system, it is characterised in that including：
Frequency-changeable compressor；
Controller, the controller is used to be controlled the frequency-changeable compressor, and the controller includes：
Starting module, the mode of operation for obtaining air-conditioning system, and the air-conditioning is started according to the mode of operation of air-conditioning system The frequency-changeable compressor of the outdoor unit of system；
Target refrigerant saturation temperature control module, for obtaining target refrigerant saturation temperature, and to the frequency-changeable compressor During VFC, the run time and the frequency-changeable compressor of the frequency-changeable compressor are obtained in the 3rd preset time period Interior start-stop time, and it is more than or equal to the 3rd time threshold, the frequency conversion compression in the run time of the frequency-changeable compressor Start-stop time of the machine in the 3rd preset time period is more than or equal to the second preset times threshold value, and the target refrigerant saturation When temperature is more than or equal to default saturation temperature threshold value, the target refrigerant saturation temperature control module is adjusted according to default step-length The target refrigerant saturation temperature；
VFC module, for carrying out VFC to the frequency-changeable compressor according to the target refrigerant saturation temperature.
11. the outdoor unit of air-conditioning system as claimed in claim 10, it is characterised in that the target refrigerant saturation temperature control Module, when being additionally operable to that the target refrigerant saturation temperature after adjustment is started shooting as the outdoor unit is next when shutting down Target refrigerant saturation temperature.
12. the outdoor unit of air-conditioning system as claimed in claim 10, it is characterised in that wherein,
When the mode of operation is heating mode, the target refrigerant saturation temperature control module subtracts according to the default step-length Few target refrigerant saturation temperature, and the run time of the frequency-changeable compressor is returned 0；
When the mode of operation is refrigeration mode, the target refrigerant saturation temperature control module increases according to the default step-length Plus the target refrigerant saturation temperature, and the run time of the frequency-changeable compressor is returned 0.
13. the outdoor unit of air-conditioning system as claimed in claim 10, it is characterised in that also include：
Temperature sensor, the temperature sensor detects the current environmental temperature of the outdoor unit local environment, wherein, if institute When stating outdoor unit and starting for the first time within the default work period, the target refrigerant saturation temperature control module is according to the outdoor The current environmental temperature of machine determines the target refrigerant saturation temperature.
14. the outdoor unit of air-conditioning system as claimed in claim 10, it is characterised in that also include：
The first pressure sensor of the frequency-changeable compressor porch is arranged on, the first pressure sensor is in the Working mould Generation first pressure detection signal when formula is refrigeration mode.
15. the outdoor unit of air-conditioning system as claimed in claim 14, it is characterised in that also include：
The second pressure sensor in the frequency-changeable compressor exit is arranged on, the second pressure sensor is in the Working mould Generation second pressure detection signal when formula is refrigeration mode.
16. the outdoor unit of air-conditioning system as claimed in claim 15, it is characterised in that the target refrigerant saturation temperature control Module selects the first pressure to detect that signal and second pressure detect that the generation of one of signal is current cold according to the mode of operation Matchmaker's saturation temperature, and target refrigerant saturation temperature is obtained, the VFC module is according to the current refrigerant saturation temperature, institute State target refrigerant saturation temperature and VFC is carried out to the frequency-changeable compressor.
17. a kind of air-conditioning system, it is characterised in that include the outdoor of the air-conditioning system as described in claim any one of 10-16 Machine.
CN201410027916.6A 2014-01-21 2014-01-21 Air-conditioning system and its control method, the outdoor unit of air-conditioning system Active CN104791943B (en)

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